Improvement Standards

Press Enter to show all options, press Tab go to next option

County of Yolo 2008 Standard Specifications and Details

Click here to download the entire Improvement Standard Document

Due to the size of the document, we have broken down the standards by section.  Please feel free to download and save as needed.  All files are in PDF format

**If you choose to download information from our website, please note it is your responsibility to check for any amendments to the Specifications and Details.**  



     Title Page - Addenda & Updates - Table of Contents         


     1.0 - Purpose


     2.0 - General Requirements


     3.0 - Improvement Plan Requirements 

   3.0 - DWG

     4.0 - Transportation

   4.0 - DWG

     5.0 - Street Lighting and Telecommunications Details

   5.0 - DWG

     6.0 - Walls


     7.0 - Sewer

   7.0 - DWG

     8.0 - Water

   8.0 - DWG

     9.0 - Storm

   9.0 - DWG

     10.0 - Grading

   10.0 - DWG

     11.0 - Stormwater

   11.0 - DWG

     12.0 - Monuments

   12.0 - DWG


The County of Yolo Standard Specifications and Details are subject to change due to State and Federal requirements, so please check this site periodically for updates and or call the Public Works Division at (530) 666-8775 for more information regarding updates.

Yolo County City/County Drainage Manual (Approved February 23, 2010)

The Drainage Manual specifies updated engineering criteria and methodology for drainage design for developments and public facilities in the unincorporated areas of Yolo County, and provides guidelines for stormwater quality treatment to supplement the Yolo County Improvement Standards. 

Drainage Manual Complete (PDF)
Precipitation Manual - GIS (ZIP)*

* Please read the "Read Me First" file contained in the ZIP file for information on how to view the GIS files.

Drainage Study Report Guidelines

Drainage Study Report Guidelines - This is a design aid, intended to help consultants and engineers demonstrate compliance with County standards.

Transportation Impact Study Guidelines (Approved February 23, 2010)

Transportation Impact Study Guidelines  

Free viewers are required for some of the attached documents.
They can be downloaded by clicking on the icons below.

Acrobat Reader Download Acrobat Reader Flash Player Download Flash Player Windows Media Player Download Windows Media Player Microsoft Silverlight Download Microsoft Silverlight Word Viewer Download Word Viewer Excel Viewer Download Excel Viewer PowerPoint Viewer Download PowerPoint Viewer